Air-compressor.



G'. P. 0. ALVER'GNAT.

AIR GOMPBESSOR. APPLICATION rum) rnn. 1, 1910.

Patented Oct-2.5.1910

8 SHEETFBHEBTL G. P. o. ALVERGNA-T.

AIR COMPRESSOR.

APPLICATION rum) H34, 1910.

Patented Oct. 25, 1910.

8 SHEETS-SHEET 2.

was 50., WASHINGTON, a. (:4

G. P. ALVERGNAT.

1 AIR COMPRESSOR. APPLICATION FILED IBB.1, 1910.

Patented Oct; 25, 1910.

8 SHEBTS+SHBET-8" UNITED STATES PATENT OFFICE.

GEORGES PROSPER.OCTAVE ALVERGNAT,0F PARIS, FRANCE, ASSIGNOR TO SOCIETE DE LA. POMPE VAIDAM, OF NEUILLY-SUR-SEINE, FRANCE.

AIR-COMPRESSOR.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed February 1, 1910. Serial No. 541,382.

To all whom 'it may concern:

Be it known that I, Gnoncns PROSPER OcTAvE ALVERGNAT, a citizen of the French Republic, and resident of Paris, France, have invented certain new and useful Improvements in Air-Compressors, of which the following is a specification.

This invention relates to improvements in air compressors.

The improved air compressor is shown in the accompanying drawings.

Figure 1 represents the improved air compressor in vertical sect-ion through the axis of revolution. Fig. 2 is a vertical section taken at right angles to Fig. 1 through the compressor cylinders. Fig. 8 is a side elevation. Figs. 4 and 5 represent, on a larger scale, two parts of Fig. 1.

According to the present invention the shaft (1, is supported by one standard I) only. Said shaft has its inner end bent upward and carries on this part (Z a ball bearing Q the other cup of which forms part of a crown p to which the rods 0 of the pistons on are articulated. The pistons m are located in the cylinders c in which they are guided by means of segments a. Said pistons m are perforated by channels 49% (Fig. 5) serving as passages for the air and at the end of each piston a leather packing collar 1" is provided the pistons presenting under said leather collars r a circular air chamber 917?. One of the piston rods 0 is not articulated but rigidly connected with the crown p.

The cylinders c are fixed to an annular disk 6 revolubly mounted by means of a ball bearing f on said main shaft a. The cylinders are fixed in said annular disk by means of lateral arms g,-h which traverse the annular disk 6 and are fixed in their position by means of nuts screwed upon their outer threaded ends. The flanged rim is of said annular disk 6 serves as pulley for the belt which drives the apparatus.

The leather packing collars r of the pistons m serve as suction flaps and the non return Valves are formed by balls 8 located in appropriate conduits parallel with the shaft 64 so that at the beginning of the compression said balls can be maintained pressed against their seats by means of spiral springs s which are sufiiciently strong to balance the centrifugal force. Thus it is possible to arrange the non return valves 8 at a sufficient distance from the center of rotation and .essential condition if the air is to be compressed at a high pressure.

The cylinders c are each connected by a tube 25 with the collector 2 which communicates by means of a hollow axle with the conduit for the air under pressure. Said hollow axle c has at its inner end an eccentric arm to which is perforated and threaded so that it can be screwed upon the end d of the main shaft a, a cotter a: serving for fixing said part w upon the end cl of said shaft a. The central part of the axle 0 serves as pivot for the revolving collector, no ball bearings being interposed between said two parts. The two parts a and y of which the envelop of the collecting chamber z is formed serve directly as bearing for the axle 'v. The airtight packing of said collecting chamber is obtained, on the one hand, by the great length of the bearing surface and, on the other hand, by means of two leather packing collars on each side, the packing collars 2, 8 and 4, 5 being arranged in steps. In order to further increase the airtight joint grooves could be provided in the parts of the axle 'v and the bearing ug which are in contact, whereby a series of expansion chambers would be formed. In order to cool the parts which surround said collector z for the air under pressure, the various revolving parts could have blades or wings.

A hood 6 could be used for covering the tubes t and their accessory parts, said hood being fixed upon the flanged rim of the an nular disk 70 in any convenient manner.

What I claim is:

An improved air compressor comprising in combination a main shaft having at its inner end an eccentric part, a ball bearing mounted on said eccentric part, piston rods articulated on said ball bearing, one of said piston rods being rigidly fixed to the same, the pistons fixed to the outer ends of said rods and having each an annular air-channel, and air inlet channels, segments in said pistons for guiding the same and a leather packing collar at the free end of each piston, the cylinders in which said pistons are guided, an annular disk revolubly mounted on said main shaft and having horizontal perforations, a lateral flanged rim of said annular disk serving as pulley for the driving belt, lateral arms of said cylinders projecting through said perforations of the annular disk, means for fixing said arms in said disk, a non return valve in each of the outlet channels for the air from the cylinders, a spiral spring for maintaining the said non return valve upon its seat, tubes connected with said air outletfchannels, a hollow axle arranged in alinement with said main shaft, an eccentric part at the inner end of said hollow axle fixed to the eccentric end of said main shaft, two cups revolubly mounted on said axle and having inner borings which form the collecting chamber to which said outlet tubes are connected and which communicates with the inner boring of said hollow axle, and stepwise arranged series of leather packing collars at the right and left of said air chamber, substantially as described and shown and for the purpose set forth.

In. witness whereof I have hereunto set my hand in the presence of two witnesses. GEORGES PROSPER OCTAVE ALVERGNAT. Witnesses:

ALFRED REY, H. 0. 00x12. 

